AOC LE24A1330 User Manual

2
Important Safety Notice
Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service
procedures recommended by AOC and described in this service manual are effective methods of performing service
operations. Some of these service operations require the use of tools specially designed for the purpose. The
special tools should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service personnel. The possibility exists that improper service
methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE
NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in
which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
Hereafter throughout this manual, AOC Company will be referred to as AOC.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics might create
shock, fire, or other hazards.
Under no circumstances should the original design be modified or altered without written permission from AOC.
AOC assumes no liability, express or implied, arising out of any unauthorized modification of design.
Servicer assumes all liability.
FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiations when open AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF
THIS SERVICE MANUAL.
Take care during handling the LCD module with backlight unit
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to
the panel.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may
damage the panel.)

AOC LE24A1330 Specifications

General

Panel Type	TN
Refresh Rate	60 Hz
Response Time	5 ms
Brightness	250 cd/m²
Contrast Ratio	1000:1
Aspect Ratio	16:9
Resolution	1920x1080
Ports	VGA
Power Consumption	25W

Summary

Safety Information

Important Safety Notice

Detailed safety guidelines and precautions for servicing the equipment.

General Warnings

Critical warnings regarding replacement parts, modifications, and potential hazards.

Laser Safety Precautions

Specific safety instructions for products containing laser components.

LCD Module Handling Precautions

Guidelines for safely handling the LCD module and its backlight unit.

General Specifications

Operating Instructions

Remote Control Functions

Detailed explanation of buttons and their functions on the remote control.

Switching Input Sources

Step-by-step guide to selecting different input sources for the TV.

Main Menu Navigation

Overview of the main menu structure and navigation controls.

Picture Menu Settings

Details on adjusting picture modes like Standard, Cinema, Vivid, Mild, Sport, Game, Personal.

Sound Menu Settings

Explanation of sound modes like Standard, Voice, Music, Theatre, Personal.

Settings Menu Options

Guide to various TV settings including channel search and system reset.

Channel Search

Instructions for performing an automatic or manual channel search.

Other Adjustments

Covers password settings, TV lock, child lock, sleep time, noise reduction, and OSD settings.

Sound and OSD Settings

Configuration options for language, menu transparency, AVL, and caption.

PC Settings

Adjustments for PC input, including auto-adjust, H/V position, phase, and clock.

System Reset

Procedure to restore TV settings to factory default values.

Media Menu Operations

Instructions for accessing and playing media files (photos, music, video, text) from USB storage.

Channel Menu

Overview of the channel menu and shortcuts for program editing.

Connection Guide

Antenna Connection

Guidance on connecting cable or VHF/UHF antennas for analog programming.

High Definition Interface Connection

Instructions for connecting high-definition sources via HDMI or component video.

Composite Signal Connection

Steps for connecting composite video and audio sources to the TV.

AV Output Connection

Information on using the VIDEO OUT terminal for external devices.

PC Connection (VGA/HDMI)

Connecting the TV to a PC using VGA or HDMI interfaces.

Front Panel Overview

Front Panel Buttons and Ports

Description of physical buttons on the TV and available input/output ports.

Input/Output Specifications

PC Input Signal Reference

Table detailing compatible PC resolutions and frequencies for VGA and HDMI inputs.

DVI/HDMI PC Input Signals

Reference chart for PC input signals via DVI and HDMI connections.

Video Input Signal Reference

Chart of supported video formats for component and HDMI inputs.

Supported Video Systems

Lists supported TV video systems and modes, like NTSC, PAL.

Mechanical Instructions

Disassembly Procedures

Steps for removing the base, rear cover, and internal components of the TV.

Panel Removal

Procedure for removing the TV panel itself.

Repair Flow Charts

Troubleshooting: No Power

Flowchart to diagnose and resolve issues where the TV does not power on.

Troubleshooting: Cannot Start

Flowchart for diagnosing startup issues, indicated by a red LED.

Troubleshooting: Abnormal Display

Flowchart to identify and fix problems related to abnormal screen display.

Troubleshooting: No Display

Flowchart for diagnosing issues where the screen remains blank or has no LED indication.

Troubleshooting: Sound Problems

Flowchart to resolve issues related to no sound or abnormal audio output.

Troubleshooting: Remote Control Malfunction

Flowchart to diagnose and fix problems with the TV's remote control.

Troubleshooting: OSD Instability

Flowchart for diagnosing issues with the On-Screen Display (OSD) or its responsiveness.

PCB Layouts

Main Board Layout

Information regarding the layout of the main circuit board.

Power Board Layout

Detailed layout diagram of the power supply board.

IR Board Layout

Diagram showing the layout of the Infrared (IR) receiver board.

Adjustments

ADC Adjustment Procedures

Detailed steps for performing Analog-to-Digital Converter (ADC) adjustments.

White Balance Adjustment

Guide for adjusting white balance for different input sources and color temperatures.

Firmware (FW) Upgrade

Instructions for upgrading the TV's firmware using a USB flash drive.

Schematic Diagrams

Main Board Schematic

Schematic diagram for the main circuit board.

Power Board Schematic

Detailed schematic diagram of the power supply board.

IR Board Schematic

Schematic diagram for the Infrared (IR) receiver board.

Exploded View and BOM

Exploded View

Diagram showing the assembly of the TV with numbered parts.

Bill of Materials (BOM) List

Comprehensive list of parts used in the LE24A1330 model.